Development of Lead Free Copper Based Alloy for Three Layers Bearings under Higher Load Engines

Sakai, Kenji; Zushi, Kouji; Sugita, Mitsuru; Ishikawa, Hideo

doi:10.4271/2004-01-1600

Cited by 17 publications

(8 citation statements)

References 3 publications

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“…The wear types mainly include abrasion, oxidation, delamination, adhesion, and thermal softening and melting [38][39][40]. Indeed, Bowden and Tabor [9] proposed that the two main contributing factors to friction generated during sliding wear could be described by (i) adhesion of flat regions of the sliding surfaces and (ii) abrasion by wear particles and hard asperities.…”

Section: Worn Surfaces Characterizationmentioning

confidence: 99%

Effect of nanosilica additive particles on both friction and wear performance of mild steel/CuSn/SnBi multimaterial system

Ait-Sadi

Hemmouche

Hattali

et al. 2015

Tribology International

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. This paper presents an experimental study of the tribological behaviour of a multimaterial system using conventional powder metallurgy process with SiO 2 nanoparticles. Four configurations were studied with and without SiO 2 . The tribological properties of the sintered materials were analysed by wear experiments at lubricated conditions on a ball disc wear test rig. The results are compared with those of conventional material for journal bearing. These show less variation of the friction coefficient and less wear rate for the materials with SiO 2 compared to the ones without SiO 2 and to those of the reference material. The dominant wear mechanism is adhesive wear, accompanied by mild abrasive wear.

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Section: Worn Surfaces Characterizationmentioning

confidence: 99%

Effect of nanosilica additive particles on both friction and wear performance of mild steel/CuSn/SnBi multimaterial system

Ait-Sadi

Hemmouche

Hattali

et al. 2015

Tribology International

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“…This meant that as the friction reduced during each test, the speed rose. The speed was monitored via a slotted disc (15), which was arranged to run through a light sensor (16) mounted on the outer frame (29) of the tribometer to prevent any interference with the contact measurement. The light sensor was connected to a frequency-to-voltage converter, which in turn was fed to the same DAq board and PC as the (20) to hold the specimen (25) parallel to the disc and a thermal barrier (21) to prevent heat being dissipated into the test arm.…”

Section: Tribometer Designmentioning

confidence: 99%

“…Bismuth is therefore a suitable replacement for lead as a seizure resistant material both in the overlay and in the lining material. It has been demonstrated [15] that the presence of bismuth improves seizure resistance over a bronze with no bismuth. Under seizure conditions bismuth sweats to the surface in a similar way as lead in such alloys.…”

Section: Bi Function/limitationsmentioning

confidence: 99%

Friction and wear performance of newly developed automotive bearing materials under boundary and mixed lubrication regimes

Kerr¹,

Priest

Okamoto

et al. 2007

Proceedings of the Institution of Mechanical Engineers, Part J:

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Global legislation on emissions and on recyclability of vehicles makes it necessary to run main and connecting rod bearing systems in automobile internal combustion (IC) engines with lower friction using lower oil flows and less viscous oils leading to more contact between bearing and shaft. At the same time lead must be removed from the system. In order to design suitable bearing materials for these new applications it is important to understand the frictional behaviour of candidate materials in a range of conditions covering the boundary and mixed regimes.Three plated plain bearing materials with overlays; a conventional lead based material, a newly developed bismuth based material, and a newly developed tin based system were tested on a tribometer specifically designed and built for this task to compare their performance in the boundary and mixed lubrication regimes under conditions that would be expected in an automobile engine. The resulting data was plotted as a series of Stribeck curves. The bismuth based material had slightly improved performance over the lead based material. The tin based material gave significantly higher friction, when compared with the other two materials.The wear properties of the materials were also tested and the variation of wear factor with testing time was plotted for each of the material at two different operating conditions. All materials experienced more severe wear in the initial stages of operation. The tin based material had the most severe wear, and showed signs of incipient melting of the overlay. The bismuth and lead based materials showed similar wear with the bismuth based material being superior under the most severe conditions, whereas the lead based material was superior under the other conditions tested.The bismuth material showed that it may be used as a suitable lead-free alternative material in IC engine applications under the conditions tested. The tin based material could not be used under such extreme conditions and failed because of thermal effects.

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“…16,17 Copper-based alloys are also improved by incorporating Bi and Mo 2 C. Further improvement in their seizure performance by applying a Bi overlay coating has also been reported. 18 Pb-free bearing alloys with Pb-free overlays are becoming more common due to new environmental regulations. Therefore, studying the seizure behaviour of overlay plated Pb-free bearing materials will be essential in understanding their tribological performance.…”

Section: Introductionmentioning

confidence: 99%

Seizure behaviour of Pb-free engine bearing materials under dry condition

Gebretsadik

Hardell

Prakash

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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Due to new environmental regulations, Pb-free engine bearing materials are becoming more common and there is a need for studying their tribological performance. Under severe operating conditions, failure due to seizure can occur in engine bearings. In this work, seizure behaviour of different multi-layered engine bearing materials has been studied by using a block-on-ring test setup under dry condition. These materials included Al–Sn-based lining with no overlay, bronze lining with polyamide-imide-based overlay containing MoS2 and graphite, bronze lining with two overlays of Al–Sn-based and polyamide-imide-based material, bronze-based lining with Sn-based overlay and bismuth (Bi)-containing bronze with Sn-based overlay. The tests were performed by gradually increasing the load at a specific time interval and in a stepwise manner and at a constant speed under unidirectional dry sliding conditions. The test materials, counter surfaces and the wear debris were analysed using SEM with a view to understand the seizure mechanisms. Bronze-based lining with a polyamide-imide-based overlay containing MoS2 and graphite does not exhibit seizure up to a load of 475 N. For Al–Sn-based lining without overlay, seizure occurs at a relatively lower load of 125 N. The Al–Sn-based lining with no overlay shows higher friction and the polyamide-imide-based overlay containing MoS2 and graphite shows lower friction during the seizure test. In most cases, there is material transfer onto the test ring counter surface. Material transfer onto the counter surface either due to severe adhesion or wear debris adhered and smeared on it. Al–Sn-based lining and an exposed Al–Sn-based overlay show severe adhesion that causes seizure. On the other hand, exposed Pb containing lining and Bi containing lining seize due to mechanical interlocking caused by the adhered wear debris on both surfaces.

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Development of Lead Free Copper Based Alloy for Three Layers Bearings under Higher Load Engines

Cited by 17 publications

References 3 publications

Effect of nanosilica additive particles on both friction and wear performance of mild steel/CuSn/SnBi multimaterial system

Effect of nanosilica additive particles on both friction and wear performance of mild steel/CuSn/SnBi multimaterial system

Friction and wear performance of newly developed automotive bearing materials under boundary and mixed lubrication regimes

Seizure behaviour of Pb-free engine bearing materials under dry condition

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